Furnace.



P. J. GORDON 6r R. T. PRALL.

FURNAGE.

APPLICATION FILED DEO. 4, 1911.

1,021,144. Patented Mar. 26, 1912.

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APPLICATION FILED D110. 4, 1911.

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P. J. GORDON & R. T. PRALL.

FURNACE.

APPLICATION H LBD D110. 4, 1911.

Patented 111211126, 1912.

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PURNAGB.

APPLICATION IILBD DBO. 4, 1011. 1,021,144. Patented Mar.26,1912.

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WITNESSESZ ,UNITED s TAT'Es PATENT oEEIoE. y

PETER J.. GRiJoN 'AND'RALPH T. PRALL, or YoUNGsTcwN, 01110.

EURNACE.

lspecification ou'etters Patent.

To all 'whom t may concern y Be it known that we, PETER J. GORDON and RALPH T. PRALL, residing atYoungstown, in the county of Mahoning and State of Ohio, citizens of the United States, have invented or discovered certain new and'useful'Improvernents in Furnaces, of which improveln'ents the following is a specification.

The 'invention described herein relates to certain improvements Ain furnaces and has for its object a construction wherebythe products of combustion, etc., are diverted l -toward the hearth and delayed in their movement toward the outlet from 'the furnace, vsuch diversion and retardation being effected preferably at two or more points.

It is a further object of the invention to provide for an introduction of heat linto the furnace at a series of two or more points in advance of the points of diversion and retardation.A y

The invention is' hereinafter more fully described and claimed.

In'the accompanying drawings forming a partofthis specification Figure 1 is a sec- Ltional elevation ofa heating furnace embodying our improvements; Fig. 2 is a secl tional elevation of our improved billet heating furnace and having incorporated therewith means for preheating the air; Fig. 3

is a transverse section on a plane indicated by the line III-III Fig. 2; Fig. 4 is a' sectional elevation of an open hearth furnace havingA our improvements applied thereto; Fig. 5 is a sectional l'plan the plane of section being indicated by the line V-V Fig. 4;

Fig. 6 is a sectional elevation of a puddling furnace embodying our improvements and Fig. 7 (is a sectional elevation of a furnace embodying a modification of our improvements.' v

- ever is formed in series of sections, the numextent on the length of the furnace.

ber of such sections being dependent to some As shown in the several views each' section conslsts of a vertical or approxlmately vertical -cross wall 1, supported on the. side walls in any suitable manner, and an inclined wall 2.

The vertical wall extends down toward the yhearth so as to for-m in connection with the hearth vor the material lying on the hearth a understood that the proximity of the lower edge of the vertical walls to the hearth will top sections 2 should have their higher ends supported by the cross Walls and should extend down to the lower edges of the neit adjacent walls, as shown in Figs. 1 and 2, although the. lower edges of the inclined secthroat or contractedpassage 3v. It `will beV f Patented Mar. 26, 1912. i Application filed December 4,1911. Serial No. 663,850.

tions and cross walls may be connected by portions-4 parallel orl approximately parallel with the hearth, as shown in Fig. 7.

The furnace is heated by oil, gas or any4 other suitable' fuel introduced-through openings 6 in the vertical walls by burners 5v suitably constructed in accordance with the kind of fuel employed. These burners are preferably so arranged that the iames, etc.,

will impinge against the inclined top sections and be diverted downwardly toward .the hearth. It has been foundin practice that by properly adjusting the burners a' swirl will be imparted to the flames, etc., by reason of implngement on the sections 2 and that the swirling action will effect a retardation of the flow through the constricted passages 3. It will be observed that retardation occurs when the flame,y products of combustion, etc., are most closely adjacent to the material to be heated and .will

therefore be more effective, band will impart, 'a uniformA temperature throughout vthe furnace.

The articles to4 be heated may be moved through the furnace either in the direction of flow of the products of combustion orin vopposition thereto as will beseen by refer-A ence to Fig. 1, in which is shown a furnace suitable for heating long or short lengths, dependent on the position while passing through the furnace. y

. In Figs. 2 and 3 is shown a furnace suitably constructed for heating billets, which are moved laterally through the furnace while supported in longitudinally arranged tubes 7. In these figures is shown a construction whereby the air employed for the combustion of the oil or gas is preheated by the products of combustion. At one end the furnace is providedwith a downtake 8 for the products of combustion, which pass along horizontal iues 9 toward the'oppo.-A site end ofthe furnace into acommon cross flue 10 to the stack. The-air to beheated enters by the cross flue 11 flows along flues 12 alternating with the flues 9, to a. cross flue 13 which is connected to pipe 14 having branch connections 15 to the burnersf As shown in Ei'gs.4 and 5 our *improvementsmay 4be applied'v to open hearth furnaces, which however are not reversible,.orl

nately connected tothe 4stackby a reversiblein other words the How of products of combustion through the melting chamberis always in theV samedirection. Provision may be made for heat-ing the air 4for example by the employment of regenerating chambers` heated by the products' of combustion asf also -show'n in Figs. 4 and 5. The downtakes 16 areconnected to a flue 17 which can be connected alternately with the chambers 18 and 19 by suitable/valve mechanism 20. These chambers are adapted to be *alter- `as shown in Fig. .6.

It will be' 'readily understood by those l skilled in the art, that the inclined top sec,-

tion 2 may be so constructed and arranged that deflection and retardation may be effected atany desired point relative to the charge o r material being heated.

, 'We claim herein as our invention:

1. A furnacehaving `a roofprovided with a series of portions ,inclined downwardly in combination with burners discharging di-v rectlyinto the furnace between inclined portions whereby'thenorinal flow ofthe'pr/ody ucts ofcombust-ion, etc. are deflected toward lthe hearth. 4

2. A. furnace having ,a roof provided with a series of portionsy inclined downwardlyand a series of burners arranged to direct the fiame,' etc. 4at'a'nacute angle against such inclined portions.r l 3. A furnace having a roof consistlng of a series of substantially vertical cross walls and a series ofinclined' top sections intermediate the vertical walls in combination with burners discharging into the furnace intermediate'the vertical walls. f j

l4.4 A furnace'ha-vinga 'roof consistingof a series of substantially verticalcross walls anda series of. intermediate downwardly in-l clined top sections in cdmbination with a f series of burners arranged to .direct the* flame and products of combustion at acute angle against the inclined t'op sections...

.5. A furnace having a roof consistng'of aseries of substantially vertical 4cross walls provided with openings" and a3 series of lintermediate downwardly inclined top Vsections lin combination with burners arranged in line with openings inthe cross-walls and "to direct the flame, etc-against'fthe'inclined sections.

In testimony whereof we Witnesses: f Y

v G. C. SHACKLEroRm- JOHN W'. WRIGHT.

have hereunto .,-RALPH'TLPRALL- 

